/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.solr.core;

import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.params.EventParams;
import org.apache.solr.search.SolrIndexSearcher;

/**
 */
public class AbstractSolrEventListener implements SolrEventListener {
	protected final SolrCore core;

	public AbstractSolrEventListener(SolrCore core) {
		this.core = core;
	}

	protected NamedList args;

	public void init(NamedList args) {
		this.args = args;
	}

	public void postCommit() {
		throw new UnsupportedOperationException();
	}

	@Override
	public void postSoftCommit() {
		throw new UnsupportedOperationException();
	}

	public void newSearcher(SolrIndexSearcher newSearcher,
			SolrIndexSearcher currentSearcher) {
		throw new UnsupportedOperationException();
	}

	@Override
	public String toString() {
		return getClass().getName() + args;
	}

	/**
	 * Add the {@link org.apache.solr.common.params.EventParams#EVENT} with
	 * either the {@link org.apache.solr.common.params.EventParams#NEW_SEARCHER}
	 * or {@link org.apache.solr.common.params.EventParams#FIRST_SEARCHER}
	 * values depending on the value of currentSearcher.
	 * <p/>
	 * Makes a copy of NamedList and then adds the parameters.
	 * 
	 * 
	 * @param currentSearcher
	 *            If null, add FIRST_SEARCHER, otherwise NEW_SEARCHER
	 * @param nlst
	 *            The named list to add the EVENT value to
	 */
	protected NamedList addEventParms(SolrIndexSearcher currentSearcher,
			NamedList nlst) {
		NamedList result = new NamedList();
		result.addAll(nlst);
		if (currentSearcher != null) {
			result.add(EventParams.EVENT, EventParams.NEW_SEARCHER);
		} else {
			result.add(EventParams.EVENT, EventParams.FIRST_SEARCHER);
		}
		return result;
	}
}
